Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments

Autores
Caram, Jorge Pablo; García-Batlle, Marisé; Almora, Osbel; Arce, Roberto Delio; Guerrero, Antonio; Garcia-Belmonte, Germà
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the outer interfaces (electrode polarization) upon biasing. Contrary to that approach, a modulation of conductive or recombination properties could manifest as an alteration in the low-frequency part of the impedance response, either producing inductive or large capacitive features. Under this last view, capacitances are not the response of polarized structures or charging mechanisms, but result from the modulation of currents. This work intends to provide pieces of evidence that assist us in distinguishing between these two dissimilar mechanisms, namely, real charge polarization and delayed current effects under bias in the dark. The analysis relays upon an experimental technique based on transient charging signals using the Sawyer-Tower circuit. Instead of applying an alternating small perturbation over a steady-state voltage (differential capacitance method), transient charging measures the resulting polarization upon a large bias step under the suppression of dc currents. Our findings reveal that real steady-state charge is indeed induced by the applied voltage in the dark, easily interpreted by means of charged real capacitors with values much larger than the geometrical capacitance of the film. The connection between that polarization and the charging of perovskite/contact interfaces is highlighted.
Fil: Caram, Jorge Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
Fil: García-Batlle, Marisé. Universitat Jaume I; España
Fil: Almora, Osbel. Universitat Jaume I; España. Universitat Erlangen-Nuremberg; Alemania
Fil: Arce, Roberto Delio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
Fil: Guerrero, Antonio. Universitat Jaume I; España
Fil: Garcia-Belmonte, Germà. Universitat Jaume I; España
Materia
CHARGE POLARIZATION
PEROVSKITE SOLAR CELL
GIANT CAPACITANCE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/141891
Acceder
id CONICETDig_e5f9013c683b9df9e2c12ea854106f22
oai_identifier_str oai:ri.conicet.gov.ar:11336/141891
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experimentsCaram, Jorge PabloGarcía-Batlle, MariséAlmora, OsbelArce, Roberto DelioGuerrero, AntonioGarcia-Belmonte, GermàCHARGE POLARIZATIONPEROVSKITE SOLAR CELLGIANT CAPACITANCEhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the outer interfaces (electrode polarization) upon biasing. Contrary to that approach, a modulation of conductive or recombination properties could manifest as an alteration in the low-frequency part of the impedance response, either producing inductive or large capacitive features. Under this last view, capacitances are not the response of polarized structures or charging mechanisms, but result from the modulation of currents. This work intends to provide pieces of evidence that assist us in distinguishing between these two dissimilar mechanisms, namely, real charge polarization and delayed current effects under bias in the dark. The analysis relays upon an experimental technique based on transient charging signals using the Sawyer-Tower circuit. Instead of applying an alternating small perturbation over a steady-state voltage (differential capacitance method), transient charging measures the resulting polarization upon a large bias step under the suppression of dc currents. Our findings reveal that real steady-state charge is indeed induced by the applied voltage in the dark, easily interpreted by means of charged real capacitors with values much larger than the geometrical capacitance of the film. The connection between that polarization and the charging of perovskite/contact interfaces is highlighted.Fil: Caram, Jorge Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; ArgentinaFil: García-Batlle, Marisé. Universitat Jaume I; EspañaFil: Almora, Osbel. Universitat Jaume I; España. Universitat Erlangen-Nuremberg; AlemaniaFil: Arce, Roberto Delio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; ArgentinaFil: Guerrero, Antonio. Universitat Jaume I; EspañaFil: Garcia-Belmonte, Germà. Universitat Jaume I; EspañaAmerican Institute of Physics2020-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/141891Caram, Jorge Pablo; García-Batlle, Marisé; Almora, Osbel; Arce, Roberto Delio; Guerrero, Antonio; et al.; Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments; American Institute of Physics; Applied Physics Letters; 116; 18; 5-20200003-6951CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/5.0006409info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:22:07Zoai:ri.conicet.gov.ar:11336/141891instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:22:07.497CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
title Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
spellingShingle Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
Caram, Jorge Pablo
CHARGE POLARIZATION
PEROVSKITE SOLAR CELL
GIANT CAPACITANCE
title_short Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
title_full Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
title_fullStr Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
title_full_unstemmed Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
title_sort Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments
dc.creator.none.fl_str_mv Caram, Jorge Pablo
García-Batlle, Marisé
Almora, Osbel
Arce, Roberto Delio
Guerrero, Antonio
Garcia-Belmonte, Germà
author Caram, Jorge Pablo
author_facet Caram, Jorge Pablo
García-Batlle, Marisé
Almora, Osbel
Arce, Roberto Delio
Guerrero, Antonio
Garcia-Belmonte, Germà
author_role author
author2 García-Batlle, Marisé
Almora, Osbel
Arce, Roberto Delio
Guerrero, Antonio
Garcia-Belmonte, Germà
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv CHARGE POLARIZATION
PEROVSKITE SOLAR CELL
GIANT CAPACITANCE
topic CHARGE POLARIZATION
PEROVSKITE SOLAR CELL
GIANT CAPACITANCE
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the outer interfaces (electrode polarization) upon biasing. Contrary to that approach, a modulation of conductive or recombination properties could manifest as an alteration in the low-frequency part of the impedance response, either producing inductive or large capacitive features. Under this last view, capacitances are not the response of polarized structures or charging mechanisms, but result from the modulation of currents. This work intends to provide pieces of evidence that assist us in distinguishing between these two dissimilar mechanisms, namely, real charge polarization and delayed current effects under bias in the dark. The analysis relays upon an experimental technique based on transient charging signals using the Sawyer-Tower circuit. Instead of applying an alternating small perturbation over a steady-state voltage (differential capacitance method), transient charging measures the resulting polarization upon a large bias step under the suppression of dc currents. Our findings reveal that real steady-state charge is indeed induced by the applied voltage in the dark, easily interpreted by means of charged real capacitors with values much larger than the geometrical capacitance of the film. The connection between that polarization and the charging of perovskite/contact interfaces is highlighted.
Fil: Caram, Jorge Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
Fil: García-Batlle, Marisé. Universitat Jaume I; España
Fil: Almora, Osbel. Universitat Jaume I; España. Universitat Erlangen-Nuremberg; Alemania
Fil: Arce, Roberto Delio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Física del Litoral. Universidad Nacional del Litoral. Instituto de Física del Litoral; Argentina
Fil: Guerrero, Antonio. Universitat Jaume I; España
Fil: Garcia-Belmonte, Germà. Universitat Jaume I; España
description A distinctive feature of hybrid perovskite light-absorbing materials is the non-negligible ionic conductivity influencing photovoltaic performance and stability. Moving ions or vacancies can naturally accumulate at the outer interfaces (electrode polarization) upon biasing. Contrary to that approach, a modulation of conductive or recombination properties could manifest as an alteration in the low-frequency part of the impedance response, either producing inductive or large capacitive features. Under this last view, capacitances are not the response of polarized structures or charging mechanisms, but result from the modulation of currents. This work intends to provide pieces of evidence that assist us in distinguishing between these two dissimilar mechanisms, namely, real charge polarization and delayed current effects under bias in the dark. The analysis relays upon an experimental technique based on transient charging signals using the Sawyer-Tower circuit. Instead of applying an alternating small perturbation over a steady-state voltage (differential capacitance method), transient charging measures the resulting polarization upon a large bias step under the suppression of dc currents. Our findings reveal that real steady-state charge is indeed induced by the applied voltage in the dark, easily interpreted by means of charged real capacitors with values much larger than the geometrical capacitance of the film. The connection between that polarization and the charging of perovskite/contact interfaces is highlighted.
publishDate 2020
dc.date.none.fl_str_mv 2020-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/141891
Caram, Jorge Pablo; García-Batlle, Marisé; Almora, Osbel; Arce, Roberto Delio; Guerrero, Antonio; et al.; Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments; American Institute of Physics; Applied Physics Letters; 116; 18; 5-2020
0003-6951
CONICET Digital
CONICET
url http://hdl.handle.net/11336/141891
identifier_str_mv Caram, Jorge Pablo; García-Batlle, Marisé; Almora, Osbel; Arce, Roberto Delio; Guerrero, Antonio; et al.; Direct observation of surface polarization at hybrid perovskite/Au interfaces by dark transient experiments; American Institute of Physics; Applied Physics Letters; 116; 18; 5-2020
0003-6951
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/5.0006409
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1842981217535787008
score 12.48226

Publicaciones similares